Challenger Center for Space Science Education ( http://www.challenger.org ) partnered with Green Trail Energy to bring its portable solar/wind generator aka "Power Droid" (right side, tower) to the 2009 NASA Desert RATS exercise in Arizona. Both NASA's Chariot and Tri-Athelete rovers were recharged by the Power Droid. Desert RATS base camp is to the center and left. To the extreme left you can see the Lunar Electric Rover (its communications gear appears twice again (partially) due to panorama processing). Further Desert RATS Updates are online at http://www.onorbit.com/taxonomy/term/85